以下是一个 使用多路复用（TMultiplexedProtocol） 的 Thrift 客户端完整流程和关键函数（以 Java 为例），适用于当服务端使用 TMultiplexedProcessor 注册了多个服务时，客户端可以区分并调用不同的服务。

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// example1.thrift
namespace java exampleservice ExampleService1 {string sayHello(1:string name)
}

// example2.thrift
namespace java exampleservice ExampleService2 {i32 add(1:i32 a, 2:i32 b)
}

使用 Thrift 编译器生成 Java 代码：

thrift --gen java example1.thrift
thrift --gen java example2.thrift

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TMultiplexedProcessor multiplexedProcessor = new TMultiplexedProcessor();multiplexedProcessor.registerProcessor("ExampleService1", new ExampleService1.Processor<>(new ExampleService1Impl()));
multiplexedProcessor.registerProcessor("ExampleService2", new ExampleService2.Processor<>(new ExampleService2Impl()));TServerTransport serverTransport = new TServerSocket(9090);
TServer server = new TThreadPoolServer(new TThreadPoolServer.Args(serverTransport).processor(multiplexedProcessor));
server.serve();

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import org.apache.thrift.protocol.TBinaryProtocol;
import org.apache.thrift.protocol.TMultiplexedProtocol;
import org.apache.thrift.protocol.TProtocol;
import org.apache.thrift.transport.TSocket;
import org.apache.thrift.transport.TTransport;import example.ExampleService1;
import example.ExampleService2;public class ThriftClient {public static void main(String[] args) {TTransport transport = null;try {// 1. 打开传输层连接transport = new TSocket("localhost", 9090);transport.open();// 2. 创建基础协议TProtocol baseProtocol = new TBinaryProtocol(transport);// 3. 使用多路复用协议（针对不同服务）TMultiplexedProtocol protocol1 = new TMultiplexedProtocol(baseProtocol, "ExampleService1");TMultiplexedProtocol protocol2 = new TMultiplexedProtocol(baseProtocol, "ExampleService2");// 4. 创建客户端 Stub（代理）ExampleService1.Client client1 = new ExampleService1.Client(protocol1);ExampleService2.Client client2 = new ExampleService2.Client(protocol2);// 5. 调用服务方法String greeting = client1.sayHello("Alice");int result = client2.add(5, 7);System.out.println("Service1 response: " + greeting);System.out.println("Service2 response: " + result);} catch (Exception e) {e.printStackTrace();} finally {// 6. 关闭连接if (transport != null) {transport.close();}}}
}

客户端代码（C++）

#include 
#include 
#include 
#include #include "ExampleService1.h"
#include "ExampleService2.h"using namespace apache::thrift;
using namespace apache::thrift::protocol;
using namespace apache::thrift::transport;int main() {try {// 客户端连接std::shared_ptr socket(new TSocket("localhost", 9090));std::shared_ptr transport(new TBufferedTransport(socket));std::shared_ptr protocol(new TBinaryProtocol(transport));transport->open();// 使用多路复用协议TMultiplexedProtocol protocol1(protocol, "ExampleService1");TMultiplexedProtocol protocol2(protocol, "ExampleService2");// 创建客户端ExampleService1Client client1(protocol1);ExampleService2Client client2(protocol2);// 调用服务std::string greeting;client1.sayHello(greeting, "Alice");std::cout << "Response from ExampleService1: " << greeting << std::endl;int result;client2.add(result, 5, 7);std::cout << "Response from ExampleService2: " << result << std::endl;transport->close();} catch (const std::exception& e) {std::cerr << "Error: " << e.what() << std::endl;}return 0;
}

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类 / 函数	作用说明
TSocket(host, port)	创建客户端传输连接（基于 TCP）
transport.open()	打开连接
TBinaryProtocol	使用二进制协议进行编码
TMultiplexedProtocol	多路复用协议，用于标识服务名称
ExampleService1.Client	客户端代理，调用服务方法
client1.sayHello("Alice")	实际调用远程服务端方法
transport.close()	关闭连接

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• 多路复用的关键是：
  • 服务端使用 TMultiplexedProcessor 注册服务（带名字）；
  • 客户端用 TMultiplexedProtocol 创建不同服务的协议实例（带同样的名字）。